Listerine in 2015 in the USA made more than $340 million. The numbers approach $1 billion if you start checking the brands, showing that Americans use mouthwash for intended purpose of oral hygiene. The active ingredients in all mouthwash are: menthol, eucalyptol, thymol, and methyl salicylate. They protect the mouth against plaque and gingivitis

Not only mouthwash protects the teeth and mouth, but it can be used for many other purposes. See them which they are:

Deodorant – take a cotton ball, soak it in Listerine, and apply it on your underarm, or just spray it.
Toenail fungus – due to the anti-fungal properties Listerine destroys fungal infections, thus soak your feet every few days for a course of couple of months.
Blisters – dup a cotton swab in Listerine and apply it on the blister 3 times a day until it disappears.
Cough – gargling Listerine 2 times a day to reduce the frequency and severity of coughs an colds, preventing bacteria from infection of the respiratory system.
Foot odor – Listerine prevents body smell as it kills odor producing germs. Make a mixture of 1 part Listerine in 2 parts of warm water and soak them for 20 minutes.
Dandruff – before using it as a mouthwash, Listerine was used as a treatment for dandruff. The ingredient in Listerine have antiseptic and anti-fungal properties. Rinse your hair and scalp with a mixture of 1 cup of water and ¼ cup of Listerine.
Lice – soak the lice-infested head in Listerine, gather the hair in a shower cap, let it act or 1 hour, and then rinse hair with water. Massage white vinegar into the scalp and gather the hair again in a shower cap. Let it act for 1 hour and wash it off with a shampoo. Then use a lice comb to remove the dead lice and remaining eggs.
Acne – Listerine has antiseptic properties that will help dry out the pimples, thus dab it with some Listerine and wake up with a clean face.